The name of the first Pūrva (canonical work of earlier lore);
it contains the description of origination of all the substances and the modes.
paḍhamaṃ uppāyapuvvaṃ ti, tattha savvadavvāṇaṃ pajjavaṇa ya uppāyabhāvamaṃgīkāuṃ paṇṇavaṇā katā.
(Nandī 104 Cū p.75)